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AGDS-MC 

Detector Information 

Detector Location 

 
Detector location will vary dependant on the individual characteristics of the target gas that is being monitored for. The descrip-
tions below describe the position for each detector after considering these characteristics.  
 
Natural Gas 
Natural gas detectors should be mounted at high level on a wall approximately 150mm from the ceiling height and avoiding 
corners and potential dead air areas. 
 
Natural gas detectors should not be mounted below the height of the top of a doorway for example. This is because as the 
gas is slightly lighter than air it will rise filling the room from the ceiling down and will spill through the top of a door opening 
into the next room. If the detectors are mounted below this height then it will take longer the gas to reach the detector. 
 
LPG  
LPG gas is heavier than air so detectors need to be mounted at low level 100mm from the floor, consideration should be given 
to any potential mopping or wet floor height. 
 
Carbon Monoxide  
Carbon Monoxide is similarly weighted to air so detectors should be mounted between 1 to 2 meters from the floor. 
 
Carbon Dioxide  

Classroom

 Carbon Dioxide detectors under guidance from IGEM/UP11/Edition2 should be mounted at a seated head height. 

However following onsite experience this mounting height can make detectors susceptible to false readings due to direct 
breath contact. We would suggest following the guidance for mounting as per a commercial kitchen to reduce the potential for 
false alarm readings.  
 

Commercial kitchen

 Carbon Dioxide detectors should be installed so they monitor the general level of CO2 within the cooking 

area. They should be mounted above standing head height and between 1m and 3m from the cooking line. Care should be 
taken so they are not located close to the edge of a canopy or in direct flow of the supply or extract ventilation. 
 

For additional information or guidance on site specific requirements please don’t hesitate to contact us. 

Detector Testing 

 
Any installed gas detector can be tested by allowing a small amount of the target gas onto the detector head until a change of 
state is registered on the control panel. 
 
If the level of gas applied is of the set low alarm level, the LED on the detector will change from a solid green to a flashing red. 
The Alert LED and a message indicating a low level alarm detection combined with an audible alarm on the panel will begin.  
 
If the level of gas drops below the set low alarm level the detector LED will return to a solid green and the panels audible alarm 
and the Alert  LED and LCD message will clear.  
 
Should an emergency shut-off valve be connected to the panel this will remain open during a low alarm level detection. 
 
If the level of gas applied is of the high alarm level or above, the LED on the detector will change from a solid green to a solid 
red. The Alert LED and an LCD message indicating a high level alarm detected combined with an audible alarm on the panel 
will begin. 
  
Should an emergency shut-off valve be connected to the panel this will automatically close.  
 
Once the level of gas drops below the high alarm level the audible alarm will continue and the Alert LED and LCD message will 
remain.  
 
The valve cannot be reinstated until the gases have been cleared and the control panel reset.   
 

 

Summary of Contents for AGDS-MC

Page 1: ...The Home of Control Automation in Ireland AGDS MC Multi Channel Gas Detection System...

Page 2: ...GDS MC Gas detection system has been designed for use in boiler houses and plant rooms Up to 16 low voltage sensors for the detection of natural gas LPG or carbon monoxide can be connected to the pane...

Page 3: ...Design Features Gas detection of Natural gas Carbon monoxide and Butane Propane L P G Compact easy to install compact system with long detector life Remote signalling can be connected to B M S and fi...

Page 4: ...alarm the panel isolates the gas supply by closing the control valve At the same time a BMS and a beacon or sounder can be activated The AGDS MC normally uses 240 volt normally closed valves but it is...

Page 5: ...2mm wide x 97mm deep This is also the power pack box size AD PP The LED indications on the panel Power on Green Gas on Red Alert Yellow The LCD indications on the panel In the event of an alarm situat...

Page 6: ...ELV multiple buttons connect in series requires a N C circuit open for alarm 6 Power connections for detectors Methane LPG CO 7 Comms connections for detectors Methane LPG CO 8 Unused Option button 9...

Page 7: ...d daisy chain AD Med Sensors Transformer pack box wall mounting BOARD WIRING FOR THE AGDS MC Gas Detection Panel Mains Supply Fuse at 3 Amps Minimum 2 Sensors Maximum 4 to be connected to main panel D...

Page 8: ...D are being correctly identified With the gas available for use apply a small amount of the target gas to each detector The AGDS MC will indicate a low level alarm at 5 LEL for combustible gases 80ppm...

Page 9: ...be issued to the end user along with instructions for the operation of the equipment As the Manufacturer Medem UK should commission this safety sys tem whereupon a commissioning report will be forwar...

Page 10: ...diagnostics Low Voltage Gas Detectors The maximum cable 4 core length between a sensor and the control panel should not exceed 100 metres If the distance between the main panel and the detectors is gr...

Page 11: ...for alarm 6 Power connections for detectors Methane LPG CO 7 Comms connections for detectors Methane LPG CO 8 Unused Option button 9 Display detectors addressed 9 to 16 10 Display detectors addressed...

Page 12: ...spur 230v EM Stop Buttons TT 70c Fire Alarm Series connected Addressable Gas detectors Connect in parallel Mains Rated Potential free contact Max load 5amp s latching relay Gas Solenoid 230v Example M...

Page 13: ...ioxide detectors should be installed so they monitor the general level of CO2 within the cooking area They should be mounted above standing head height and between 1m and 3m from the cooking line Care...

Page 14: ...nections in the panel TB2 TB1 TB3 Use terminals TB2 A and TB2 C TB2 TB1 TB3 Use terminals TB2 A and TB2 C Multiple Switches Wire in series Remote stop buttons can be connected to the panel terminal ma...

Page 15: ...Limited Otter House Naas Road Clondalkin Dublin 22 Tel 00353 1 461 4300 E sales modernplant ie W www modernplant ie Please do not hesitate to call for advice on the following number 00353 1 461 4300...

Page 16: ...safety product range Both companies work closely to ensure the products remain best in class We stock a comprehensive range of Haws AG emergency equipment We also supply special models to the highest...

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